If you take a close look at the slide where the lock engages you will see that it is rounded. This may be rectified by taking a small file and bringing the notch back to 90 degrees. This should fix your issue assuming there are no others present. Please note: your serial number indicates this is an Umarex product. Proceed at your our risk with this procedure. If you are not comfortable attempting this please return your gun to Umarex for a warranty repair.

If you take a close look at the slide where the lock engages you will see that it is rounded. This may be rectified by taking a small file and bringing the notch back to 90 degrees. This should fix your issue assuming there are no others present. Please note: your serial number indicates this is an Umarex product. Proceed at your our risk with this procedure. If you are not comfortable attempting this please return your gun to Umarex for a warranty repair.

hm interesting...when i examine stock/user photos i see its rectangular instead of rounded yes. However - can this be a production issue or did it just broke of ? I have a diamond file, but think ill go for a replacement part then.

Could there be also any other issues? like to less gas being pumped for the recoil?

hm interesting...when i examine stock/user photos i see its rectangular instead of rounded yes. However - can this be a production issue or did it just broke of ? I have a diamond file, but think ill go for a replacement part then.

Could there be also any other issues? like to less gas being pumped for the recoil?

There could be a number of issues from insufficient gas to a damaged BB follower in addition to what was mentioned before. Because this product is supported by Umarex and not KWA, you should follow-up with them regarding repair or parts replacement. You have a 1 year warranty from them so all should be good I figure.

There could be a number of issues from insufficient gas to a damaged BB follower in addition to what was mentioned before. Because this product is supported by Umarex and not KWA, you should follow-up with them regarding repair or parts replacement. You have a 1 year warranty from them so all should be good I figure.

ill contact the dealer first thing tomorrow morning. Regarding umarex / kwa - dealer sold it as KWA built with umarex brandings, therefor my questions here but of course, its a Umarex variant (KWAM OEM), thus replacement support needs to go via them.

ill contact the dealer first thing tomorrow morning. Regarding umarex / kwa - dealer sold it as KWA built with umarex brandings, therefor my questions here but of course, its a Umarex variant (KWAM OEM), thus replacement support needs to go via them.

Yes, that's correct. Until recently, KWA had an agreement to distribute HK licensed GBB products on behalf of Umarex. This agreement has since ended and now all tech and warranty support is supposed to come from Umarex. That said, we wouldn't want to leave you high and dry and thus the reply to your post. Moving forward you should contact Umarex however.

hi all, i just came back from the store. they gave me a brand new Umarex HK45 (built by KWA). tested it at home immediatly and fires perfect so far. Thanks for the support and advice. Much appreciated.

hi all, i just came back from the store. they gave me a brand new Umarex HK45 (built by KWA). tested it at home immediatly and fires perfect so far. Thanks for the support and advice. Much appreciated.

Paul, can you tell me if you have still the same problem? i had exactly the same thing with my H&K MK 23. its the same construction. looking on the internet the used material seem to be the problem. this type of aluminium is to softfor this construction. i`ve found a suplier that make`s the parts of steel. but € 200,00 is to expensive for me. marcron

Note the pistol has a slide stop. If incorrectly used as a slide release it can round the retention slot in the slide as shown in the photo posted several weeks ago which shows pretty severe damage rather than a defect. Soft metal slide is more prone to this damage than one made of steel but it's still a slide stop. Professional firearms training schools rarely recommend using it as a slide stop as long as you retain the use of both hands.

Yes, it will release the slide if depressed but this is considered a fine motor skill and subject to failure in moments of stress. Reach over the slide, thumb pointed toward your chest, and cycle the slide to close it. Works for all pistols, all the time. (Some pistols lack external slide stops.)

Please don't point out professional shooters who shoot thousands of rounds a week using it as a slide release! They have skills we mere mortals seldom achieve and mimicking some their fine motor skill techniques in inefficient.

Agree with Chuck 100% on this. But I still noticed that there was a little rounding even after I filed it straight again so I used some "clear coat" resin (from building fishing rods) on the notch in the slide to resist additional wear. So far so good.

Agree with Chuck 100% on this. But I still noticed that there was a little rounding even after I filed it straight again so I used some "clear coat" resin (from building fishing rods) on the notch in the slide to resist additional wear. So far so good.